Isaiah Quintabe, called IQ, a young black man who solves crimes using his intellect and Sherlock Homes-like observations, in east Long Beach, California:

IQ (2016) [review]
2017 Anthony Award for Best First Novel
2017 Macavity Award for Best First Mystery
2017 Shamus Award for Best First PI Novel
Finalist 2017 Barry Award for Best First Novel
Finalist 2017 Edgar Award for Best First Novel